Plastic compositions and vehicles thereof



Patented Oct. 12, 1937 'UNITED STATES Pram" or ice PLASTIC COMPOSITIONSAND VEHICLES THEREOF Emanuel Siiberman, Philadelphia, Pa.

No Drawing. Application June 21, 1934, Serial No. 731,646

1 Claim.

The object of the invention is to provide improvements in plasticcompositions broadly, but

: which may be marketed either alone or as an integral part of the saidcomposition, and which is also composed of ingredients, each of which isa derivative or extract in some manner or H other from natural wood, itbeing understood, of 1d course, that any synthetic or other form of. ma-

terial, when and if possible to substitute for a given ingredient ashereinafter specified, which produces a result that is identical withthose enumerated below, is to be considered to all intents and purposeswithin the scope of the present invention.

Still another object is to provide a filler of this type, which isespecially adapted to be employed in filling cracks and openings ofvarious sorts in bodies of wood, without the usual tendency of suchfillers to shrink in time, and thereby crack and/or separate from thesurrounding or otherwise adjacent surfaces of the wooden body, since thefact that all of the ingredients as herein- 30 after set forth, arecomposed either of or are derived from wood, insures a degree ofcohesion of the filler to the wooden body, such as cannot be attainedwhere mere adhesion of inherently unlike substances is depended upon.

And a still further object is to provide a filler of this type, whichmay be of any desired degree of plasticity when used; which will rapidlysolidfy while cohering integrally with the adjacent wooden surfaces;which is of relatively low cost to produce; which can be readily madefireproof or fire-resisting; which will take stain, varnish, or thelike, similar to the adjacent portions of the wooden body; and which isin every way satisfactory for the purposes desired.

The present invention, broadly considered, therefore consists in otherwords in producing a liquid vehicle, as well as a plastic composition,in either of which the danger of fire, explosion, or infiammability, maybe minimized by the addition of proper substances or chemicals, ifdesired, in order to lessen the fire hazard in the manufacture, use,storage, or general handling, of such substances. Furthermore, theinvention comprises the assembly of wood or cellulose derivatives insuch combination and proportions,

that when thoroughly mixed, or kneaded together, a doughy-like mass of,putty-like consistency is produced which can be used for cold moulding,or with heat and pressure for certain types of moulding.

In carrying out the present invention, I have developed several formulaefor the liquid vehicle above referred to which in the order of theirpreference are given as follows:

Formula A Parts by weight Cellulose, or cellulose acetate, orcuprammonium cellulose, or cellulose Xanthate, separately or a combinedmixture of, any two or more of these to 25 Rosin (colophony) 5 to 10Camphor 10 to Methyl-acetone 70 to 45 Formula B Parts by weightCellulose or viscose 18 to 23 Rosin 2to 4 Rosin oil 1 to 3Methyl-acetone 77 to 69 Spirts (turpentine) 2 to 1 Formula C Parts byweight Cellulose, or cellulose acetate, or hydrated ligno cellulose or amixture of any two or more of these 15 to 20 Rosin (colophony) 5 to 10Methyl-acetone 80 to '70 Formula D Parts by weight Cellulose acetate, orcuprammonium cellulose, or cellulose xanthate or a mixture of any two ormore of these 15 to 20 Rosin 4 to 16 Wood oil 1 to 3 Methyl-acetone 80to 61 Formula E Parts by weight Hydrolized ligno cellulose or pulp 15 to20 Rosin 4to 16 Wood oil 1 to 3 Methyl-acetone 80 to 61 Formula F Partsby weight Wood scrap 16 to Rosin (colophony) 3 to 5 Methyl-acetone 80 to65 Wood oil 1 to 5 Formula G Parts by weight Viscose 15 to 20 Rosin 5 toMethyl-acetone or any suitable solvent or ketone 80 to 70 Having any oneof the foregoing formulae, with any substitution if desired among thealternatives noted, there is added to the same from 18 to 30 parts offinely divided wood flour, in order to produce the filler, it beingnoted that upon the addition of the wood flour, the, mass is thoroughlykneaded until a doughy-like mass of putty-like consistency is attained.

Such a plastic composition as that produced from any of the formulaelisted, in the proper combination with wood flour, may be used to fillspaces in many different materials, altho it has been producedespecially for use with wooden bodies, as hereinabove stated. Such acomposition will dry hard in the air for cold-moulding without the aidof heat, but by the combined use of heat and pressure can be moulded insubstantially any desired shape, pigments of various forms can be addedto impart desired colors to it, and the finished product can be painted,varnished, shellacked, or otherwise coated or decorated, while articlesformed of such composition can be cut, sawed, polished, or otherwisemanipulated when fully hardened.

Summing up, the invention comprises (1) a liquid solution and (2) atruly plastic wood composition. The liquid solution has for its base analkali cellulose, cellulose acetate, a hydrated cellulose, or evenhydrolized ligno cellulose, made from such materials as wood, fibreboard, wood pulp, wood fibre, and fibres containing li-gno cellulose, towhich is added rosin, a wood oil, and a methyl-acetate liquid in suchproportions that it can be used as a plasticizer and binder for variouspigments in paints, varnishes, lacquers, enamels, shellacs, etc. or as abinder for wood in its plastic form in the making of putty, or formixing with inks, adhesives, or cements, and for moulding compounds andgeneral repair work; for making fine threads, sheets, films, solids,ornaments, etc; as a direct coating for wood, paper, fibre, pasteboard,leather, etc.; as a liquid for general water-, grease-, gasolene,climate-, and general-proofing, and as an insulator for variouspurposes.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:-

A composition of matter comprising a cellulose derivative, rosin, rosinoil, camphor, acetone and wood flour, in such relative proportions as'to produce a doughy-like mass of putty-like consistency.

EMANUEL M. SILB-ERMAN.

